Registration Dossier
Registration Dossier
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EC number: 266-002-0 | CAS number: 65996-69-2 The fused substance formed by the action of a flux upon the gangue of the iron-bearing materials charged to a blast furnace and upon the oxidized impurities in the iron produced. Depending upon the particular blast furnace operation, the slag is composed primarily of sulfur and oxides of aluminum, calcium, magnesium, and silicon.
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
No special studies on sediment toxicity to benthic organisms are available but several observations suggest that slags do not negatively influence the sediment quality and that slags are excellent substrate for growth of benthos.
Key value for chemical safety assessment
- EC10, LC10 or NOEC for freshwater sediment:
- 100 000 mg/kg sediment dw
- EC10, LC10 or NOEC for marine water sediment:
- 100 000 mg/kg sediment dw
Additional information
In a field study it has been shown that benthic organisms growing on slags (BOS) exhibited even greater species diversity and population density than on natural rock. So no negative influence of slags on benthic organisms could be detected. Therefore a NOEC = 100 g/kg was taken as a default value for calculations.
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